SAM 26000 may be "the most important historical airplane in the world," said Air Force historian Jeff Underwood. It supported a mission to open U.S relations with China and flew to secret Paris peace talks during the Vietnam War. But it's probably most closely tied to President John F. Kennedy, who first used it in 1962.
First lady Jacqueline Kennedy and the president exit SAM 26000 in Texas in November 1963, just hours before the president would be assassinated. Five months earlier, the plane had flown Kennedy to Berlin, where he delivered his historic "I am a Berliner" address.
This is likely the most famous photograph ever taken aboard any presidential aircraft. Hours after the attack -- and shortly before SAM 26000 left Dallas -- Vice President Lyndon Johnson was sworn in as president with the first lady at his side. Federal Judge Sarah Hughes administered the oath, the only woman ever to do so.